The GLAM toolkit is an OpenGL-based cross platform user interface toolkit for creating 2D or 3D user interfaces. Its main purpose is to provide the underlying framework for a user interface, leaving the visual look and feel to the developer.

GhostEngine is a game engine coded in C++, available for Windows, Linux, and MacOS. It is currently in heavy development, only fully available for Windows and partially for Linux, but work is being done to allow portability.

Libsmog is a flexible 3D game engine written in C++. It has been designed from the ground up to provide a dynamic, performance oriented, flexible, multi-player, easy to implement audio and visual experience.